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Synthesis,characterization and catalytic applications of triden-tate Schiff base derivatives of bis and mono(cyclopentadienyl)-lanthanocene complexes 被引量:1

Synthesis,characterization and catalytic applications of triden-tate Schiff base derivatives of bis and mono(cyclopentadienyl)-lanthanocene complexes
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摘要 Seven kinds of lanthanocene complexes were prepared by the reaction of tridentate Schiff base | N-(2-methoxyphenyl)salicylideneamine with tris(cyclopentadienyl) lanthanide tetrahydrofuranate or bis (cyclopentadienyl) lanthanide chloride tetrahydrofuranate in THF. All the complexes were characterized by MS, EA and IR respectively. The structure of |Cp2LnC14U13NO2) Ln = Sm, Dy, Y, Er| (1–4) was further confirmed by X-ray determination of Cp2Sm(C14H13NO2) (1) which indicates that the complex is monomeric in which central metal is coordinatively saturated by two cyclopentadienyl rings, two oxygens and one nitrogen of the ligand. The isomerization of 1,5-hexadiene explains that complexes (1–4) isomerize this monomer into a mixture of 1,4-hexadiene, 2,4-hexadiene, 1,3-hexadiene, methylenecyclopentane and methyl–cyclopentene. Similarity complexes |CpLn(a) C14 H13NO2) (THF) (Ln=Sm, Dy, Y, Er)| (5–7) polymerize methyl-methacrylate (MMA) to give polyMMA (PMMA) in 51.8% yield and high molecular weight (274 × 103), which shows narrow molecular weight distributions and partially syndiotactic. Seven kinds of lanthanocene complexes were prepared by the reaction of tridentate Schiff base | N-(2-methoxyphenyl)salicylideneamine with tris(cyclopentadienyl) lanthanide tetrahydrofuranate or bis (cyclopentadienyl) lanthanide chloride tetrahydrofuranate in THF. All the complexes were characterized by MS, EA and IR respectively. The structure of |Cp2LnC14U13NO2) Ln = Sm, Dy, Y, Er| (1–4) was further confirmed by X-ray determination of Cp2Sm(C14H13NO2) (1) which indicates that the complex is monomeric in which central metal is coordinatively saturated by two cyclopentadienyl rings, two oxygens and one nitrogen of the ligand. The isomerization of 1,5-hexadiene explains that complexes (1–4) isomerize this monomer into a mixture of 1,4-hexadiene, 2,4-hexadiene, 1,3-hexadiene, methylenecyclopentane and methyl–cyclopentene. Similarity complexes |CpLn(a) C14 H13NO2) (THF) (Ln=Sm, Dy, Y, Er)| (5–7) polymerize methyl-methacrylate (MMA) to give polyMMA (PMMA) in 51.8% yield and high molecular weight (274 × 103), which shows narrow molecular weight distributions and partially syndiotactic.
出处 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2000年第5期740-744,共5页 中国化学(英文版)
基金 Project supported by the National Natural Science Foundation of China (No.29871919) and Sino-Pec (No.29734145) the State Key Laboratory of Coordination Chemistry, Nanjing University
关键词 Lanthanocene tridentate Schiff base SYNTHESIS X-ray determination Lanthanocene tridentate Schiff base synthesis X-ray determination
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同被引文献8

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  • 8徐伟箭,黄翠华.含荧光素的荧光高分子合成及荧光性质研究[J].湖南大学学报(自然科学版),2001,28(3):23-26. 被引量:2

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